@misc{indiciae98a92e78a417,
  title = {Geology of the Button Butte-Forestgrove area, Fergus County, Montana},
  author = {L.S. Gardner},
  year = {1950},
  doi = {10.3133/om106},
  url = {https://pubs.usgs.gov/publication/om106},
  note = {Source identifier: om106}
}